14. reproduction is not essential for the survival of an individual __________ but is essential for the survival of the __________
15. what is meant by extinction?
16. name and define the two basic kinds of reproduction
17. how do all organisms begin life?
18. what is the difference between growth and development?
19. do unicellular organisms grow?
20. do unicellular organisms develop?
21. do multicellular organisms grow?
22. do multicellular organisms develop?
23. how is the growth of a living thing different from the growth of a nonliving thing?
24. define energy.
25. why is energy important to a living organism?
26. what is the difference between an autotroph and a heterotroph?
27. what is the name of the process that plants use to make their own food using energy from the sun?
28. what are some environmental factors (stimuli) that organisms respond to?

Question

Accepted Answer

### Question 14
# Brief Explanations:
Reproduction is not essential for an individual's survival (as an individual can live without reproducing) but is essential for the survival of the species (to ensure the species continues over time, avoiding extinction).
# Answer:
organism; species

### Question 15
# Brief Explanations:
Extinction is the complete disappearance of a species from Earth. When the last individual of a species dies, that species is considered extinct. It can occur due to factors like habitat loss, climate change, overhunting, or competition.
# Answer:
Extinction is the complete disappearance of a species when the last individual of that species dies.

### Question 16
# Brief Explanations:
- **Asexual Reproduction**: Involves only one parent. The offspring are genetically identical to the parent (clones). Examples include binary fission (in bacteria), budding (in yeast), and fragmentation (in flatworms).
- **Sexual Reproduction**: Involves two parents (a male and a female, or two gamete - producing individuals). Offspring inherit genetic material from both parents, resulting in genetic variation. Examples include reproduction in humans, dogs, and flowering plants (via pollination and fertilization).
# Answer:
- Asexual Reproduction: Reproduction with one parent, offspring genetically identical to the parent (e.g., binary fission, budding).
- Sexual Reproduction: Reproduction with two parents, offspring inherit genes from both, leading to genetic variation (e.g., human reproduction, plant pollination).

### Question 17
# Brief Explanations:
All organisms begin life as a single cell. For sexually reproducing organisms, this is a zygote (formed by the fusion of a sperm and an egg). For asexually reproducing organisms, it can be a single - celled offspring (like a bacterium from binary fission or a yeast bud) that then grows and develops.
# Answer:
All organisms begin life as a single cell (a zygote in sexual reproduction, a single - celled offspring in asexual reproduction).

### Question 18
# Brief Explanations:
- **Growth**: Refers to an increase in size or number of cells. It is a physical change, often measured by an increase in mass or volume. For example, a plant seedling increasing in height or a human child gaining weight.
- **Development**: Involves changes in the structure, function, and complexity of an organism over time. It includes processes like cell differentiation (where cells become specialized, e.g., stem cells becoming nerve cells or muscle cells) and the formation of organs and organ systems. For example, a human embryo developing into a fetus with distinct organs, or a caterpillar developing into a butterfly (metamorphosis).
# Answer:
Growth is an increase in size/number of cells; Development is the change in structure/function/complexity of an organism (involves differentiation, organ formation, etc.).

### Question 19
# Brief Explanations:
Yes, unicellular organisms grow. They grow in size as the single cell takes in nutrients, synthesizes new molecules, and increases in volume or mass. For example, a bacterium will grow in size before it undergoes binary fission to reproduce.
# Answer:
Yes, unicellular organisms grow by increasing the size of their single cell (e.g., a bacterium grows before binary fission).

### Question 20
# Brief Explanations:
Unicellular organisms do develop, but their development is relatively simple compared to multicellular organisms. They may undergo changes in structure or function in response to the environment or as part of their life cycle. For example, some unicellular organisms may change their shape or develop protective structures (like a cyst) when conditions are unfavorable. Also, during their life cycle, they may go through stages of growth, reproduction - related changes, and adaptation to the environment, which can be considered development.
# Answer:
Yes, unicellular organisms develop (e.g., changing structure/function in response to environment, life - cycle changes).

### Question 21
# Brief Explanations:
Yes, multicellular organisms grow. They grow by increasing the number of cells (through cell division) and the size of cells. For example, a tree grows by producing new cells in the meristems (regions of active cell division) and those cells then increase in size. A human grows from an infant to an adult by both cell division (increasing the number of cells) and cell growth (increasing the size of cells).
# Answer:
Yes, multicellular organisms grow by increasing cell number (cell division) and cell size.

### Question 22
# Brief Explanations:
Yes, multicellular organisms develop. Development in multicellular organisms involves complex processes such as cell differentiation (where cells become specialized, like stem cells becoming skin cells, muscle cells, etc.), tissue formation, organ development, and organ system integration. For example, a human embryo develops into a fetus with distinct organs, and then a child develops into an adult with mature organ systems. Plants also develop, with seeds germinating into seedlings, then developing roots, stems, leaves, and eventually reproductive structures.
# Answer:
Yes, multicellular organisms develop (e.g., cell differentiation, organ development, like human embryo to adult or plant seed to mature plant).

### Question 23
# Brief Explanations:
- **Growth of living things**: Occurs from within the organism, due to cell division and cell growth. It is a result of biological processes like metabolism (using energy to build new molecules). Living things grow in a controlled way, following genetic instructions, and growth is related to the organism's life functions (e.g., a plant grows to maximize photosynthesis).
- **Growth of non - living things**: Often occurs from the outside, like accumulation of matter (e.g., a crystal grows by adding more mineral molecules to its surface, or a snowball grows by accumulating more snow). Non - living things do not have biological processes driving their growth, and their growth is usually a physical process without a connection to life functions.
# Answer:
Living thing growth: Internal, via cell division/growth, biological processes (metabolism), controlled by genes. Non - living thing growth: External, via matter accumulation, physical process, no life - function connection.

### Question 24
# Brief Explanations:
Energy is the ability to do work or cause change. It exists in different forms such as light energy, chemical energy, mechanical energy, and thermal energy. In living organisms, energy is used for processes like growth, reproduction, movement, and maintaining homeostasis. For example, chemical energy in food is converted into energy for cellular processes (like ATP in cells).
# Answer:
Energy is the ability to do work or cause change (exists in forms like light, chemical, used in biological processes).

### Question 25
# Brief Explanations:
Energy is important to living organisms because it is required for all life processes. These include:
- **Metabolism**: Breaking down food (or using stored energy) to release energy for cellular work.
- **Growth**: Building new cells and tissues requires energy.
- **Reproduction**: Producing offspring (both asexual and sexual reproduction) needs energy.
- **Movement**: From the movement of a single cell (like a sperm) to the movement of an entire organism (like a cheetah running).
- **Homeostasis**: Maintaining a stable internal environment (e.g., regulating body temperature, blood sugar levels) requires energy. Without energy, these essential processes would stop, and the organism would die.
# Answer:
Energy is essential for life processes: metabolism, growth, reproduction, movement, and maintaining homeostasis (without it, organisms cannot survive).

### Question 26
# Brief Explanations:
- **Autotrophs**: Organisms that can make their own food. Most autotrophs use photosynthesis (using light energy, carbon dioxide, and water to make glucose and oxygen) or chemosynthesis (using chemical energy from inorganic compounds, like in some bacteria near hydrothermal vents). Examples include plants, algae, and some bacteria.
- **Heterotrophs**: Organisms that cannot make their own food. They obtain energy by consuming other organisms (or organic matter). Examples include animals, fungi, and most bacteria. Heterotrophs can be herbivores (eating plants), carnivores (eating animals), or omnivores (eating both plants and animals).
# Answer:
- Autotrophs: Make their own food (e.g., photosynthesis/chemosynthesis, plants, algae).
- Heterotrophs: Obtain food by consuming other organisms (e.g., animals, fungi, most bacteria).

### Question 27
# Brief Explanations:
The process by which plants make their own food using energy from the sun is photosynthesis. In photosynthesis, plants (and some other organisms like algae) use carbon dioxide, water, and light energy (from the sun) to produce glucose (a sugar, which is food) and oxygen. The chemical equation for photosynthesis is $6CO_2 + 6H_2O\xrightarrow[Chlorophyll]{Light}C_6H_{12}O_6+6O_2$.
# Answer:
Photosynthesis (plants use light energy, $CO_2$, and $H_2O$ to make glucose and $O_2$).

### Question 28
# Brief Explanations:
Organisms respond to various environmental factors (stimuli), including:
- **Light**: For example, plants grow towards light (phototropism), and some animals are active during the day (diurnal) or night (nocturnal) based on light.
- **Temperature**: Organisms may move to warmer or cooler areas (e.g., lizards basking in the sun to warm up, or fish moving to deeper, cooler water in summer).
- **Water**: Organisms need water, and may respond to water availability (e.g., plants wilting when water is scarce, or desert animals being active at night to avoid water loss).
- **Chemicals**: Like nutrients (organisms move towards food sources) or toxins (organisms move away from harmful chemicals).
- **Gravity**: Plants show gravitropism (roots grow downwards, stems grow upwards), and some animals use gravity for orientation.
- **Touch**: For example, the Venus flytrap closes its leaves when touched by an insect, and some plants (like mimosa) fold their leaves when touched.
# Answer:
Environmental factors (stimuli) organisms respond to include light, temperature, water, chemicals, gravity, and touch.

Sovi.AI - AI Math Tutor

QUESTION IMAGE

Question

Explanation:

Question 14

Answer:

Question 15